Bolt and nut lock.



H. L. HUGGINS.

BOLT AND NUT LOOK.

APPLIUATION rum JUNE 24, 1911.

Patented Aug. 6. 1912.

HILLARY I. HUGGINS, 0F DAMASCUS, VIRGINIA.

BOLT AND NUT LOCK.

Specification of Letters Patent.

Patented Au. 6,:1912.

Application filed June 24, 1911. Serial No. 685,087.

To all whom it may concern:

Be 1t known' that I, HILLARY L. Huooms, a citizen of the United States of America,

residing at Damascus, in the county of locks and one of the principal objects of the invention is to provide simple and reliable means for looking a bolt and nut and to prevent either the bolt or nut from turning when locked, without mutilating either the bolt or nut.

. Another object of the invention is to provide a reliable lock for a bolt and nut said bolt and nut being of the usual construction without requiring any modification or mutilation and the locking device comprising a washer o'r fish plate having curved inclined recesses for locking wedges to prevent the nut or bolt vfrom turning when the nut has been tightened up against the washer or against the wedges in the recesses.

These and other objects may be attained by means of the construction illustrated in theaccompanying drawings in which Figure 1 is a front elevation of a plate similar to a fish plate for railway rails and showing the construction of the washer resting upon the base flange of the plate, the bolt and nut being removed; Fig. 2 is a horizontal sectional view on the line 2-2 looking in the direction indicated by the arrows. of Fig. 1 showing the bolt and nut in place; Fig. 3 is a detail perspective view of one of thetoothed wedges for locking the nut to the washer. I

Referring to the drawing the numeral 1 designates a plate which may be used as afish plate or for any purpose desired, said plate being preferably provided with a base flange 2. The plate 1 is provided with an aperture 3 extending through the same. An ordinary bolt provided with a square or polygonal I head 4 and a screw threaded shank 5 is placed in said openingand an ordinary nut 6 is connected to the threaded end of the shank 5.

For hdlding the bolt and nut from turning after it has been screwed into place I provide a washer 7 having a plain unthreaded o ening 8 through the same, said washer pre erably having a plain lower edge 9 to rest on the flange 2 of the plate 1'. The washer 7 is provided with two curved recesses 10 which are preferably concentric with the opening 8 in the washer 7 said re cesses having inclined bottoms, as shown.

Placed in the recesses 10 are curved wedges 11 provided with ratchet teeth 12,- said wedges being thicker at one end 13 and thinner at the other end 14:, as shown more clearly in Fig. l. The wedges 11 may be placed in the recesses 10, and when the nut 6 has been screwed onto the shank 5 of the bolt, until it has been brought in contact with the wedges, any movement tending to unscrew the nut will, by reason of the teeth of the wedges biting into the inner surface of the nut, force the wedges against the inclined bottoms of the recesseslO, making the teeth of the wedges bite more and more into the nut and thus effectually preventing accidental removal of the nut.

It will be obvious that the recesses 10 may be formed directly in the fish plate and any number of bolt holes may be used in the fish plate for securing the meeting ends of the rails together.

From the foregoing, it will be obvious that my invention is slmple in construction, will hold the nut from turnin off the bolt by the jarring action of the train as it passes over the rails.

It will also be obvious that any ordinary nut and bolt may be used without mutilation or changein structure.

What I claim 1s: z A nut lock comprising an immovable plate having a straight bottom edge adapt-' ed to rest against the bottom flange of a rail to keep said plate from turning, said plate being provided with a 'bolt-.hole for the reception of a bolt, said plate further provided at a short distance from said bolt hole with two curved recesses diametrically opposed and concentric with the bolt hole, said recesses having inclined cam bUtlOIDa' and vertical parallel Walls, one enda nut screwed onto said bolt to prevent seeiof each recess terminating in a vertical dental removal of said nut. 11) shoulder, the other end merging into the In testimony whereof I afiix my signature outer surface of the plate, Wedge-shuped in presence of two witnesses. curved locking members adapted to slide iii I HILLARY L. HUGGINS. said recesses, said locking members pro- Witnesses: vided with teeth upon the upper surfaces JOHN L. CASSELL, thereof forengaging the under surface of I G. W. OSBORN.

Qopies oi this patent may be obtained rnr five. cents eaeh, by'addressing the Commissioner of Patents,

' Washington, D. G." 

